From: Marcus Folkesson Date: Fri, 28 Oct 2022 07:50:19 +0000 (+0200) Subject: watchdog: rn5t618: add support for read out bootstatus X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=47c008050aec3e9a13af29dd74cd8b4c112bc07b;p=linux.git watchdog: rn5t618: add support for read out bootstatus The PMIC does store the power-off factor internally. Read it out and report it as bootstatus. Signed-off-by: Marcus Folkesson Acked-by: Lee Jones Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20221028075019.2757812-1-marcus.folkesson@gmail.com Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- diff --git a/drivers/watchdog/rn5t618_wdt.c b/drivers/watchdog/rn5t618_wdt.c index 6e524c8e26a8f..40d8ebd8c0acd 100644 --- a/drivers/watchdog/rn5t618_wdt.c +++ b/drivers/watchdog/rn5t618_wdt.c @@ -144,6 +144,8 @@ static int rn5t618_wdt_probe(struct platform_device *pdev) struct rn5t618 *rn5t618 = dev_get_drvdata(dev->parent); struct rn5t618_wdt *wdt; int min_timeout, max_timeout; + int ret; + unsigned int val; wdt = devm_kzalloc(dev, sizeof(struct rn5t618_wdt), GFP_KERNEL); if (!wdt) @@ -160,6 +162,16 @@ static int rn5t618_wdt_probe(struct platform_device *pdev) wdt->wdt_dev.timeout = max_timeout; wdt->wdt_dev.parent = dev; + /* Read out previous power-off factor */ + ret = regmap_read(wdt->rn5t618->regmap, RN5T618_POFFHIS, &val); + if (ret) + return ret; + + if (val & RN5T618_POFFHIS_VINDET) + wdt->wdt_dev.bootstatus = WDIOF_POWERUNDER; + else if (val & RN5T618_POFFHIS_WDG) + wdt->wdt_dev.bootstatus = WDIOF_CARDRESET; + watchdog_set_drvdata(&wdt->wdt_dev, wdt); watchdog_init_timeout(&wdt->wdt_dev, timeout, dev); watchdog_set_nowayout(&wdt->wdt_dev, nowayout); diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h index 8aa0bda1af4fa..aacb6d51e99cb 100644 --- a/include/linux/mfd/rn5t618.h +++ b/include/linux/mfd/rn5t618.h @@ -227,6 +227,15 @@ #define RN5T618_WATCHDOG_WDOGTIM_S 0 #define RN5T618_PWRIRQ_IR_WDOG BIT(6) +#define RN5T618_POFFHIS_PWRON BIT(0) +#define RN5T618_POFFHIS_TSHUT BIT(1) +#define RN5T618_POFFHIS_VINDET BIT(2) +#define RN5T618_POFFHIS_IODET BIT(3) +#define RN5T618_POFFHIS_CPU BIT(4) +#define RN5T618_POFFHIS_WDG BIT(5) +#define RN5T618_POFFHIS_DCLIM BIT(6) +#define RN5T618_POFFHIS_N_OE BIT(7) + enum { RN5T618_DCDC1, RN5T618_DCDC2,